Lawn-trimmer.



H. J. HUBER.

LAWN TRIMMER.

APPLICATION FILE-D JAN10,1908.

91 1,073. Patented Feb. 2, 1909.

2 SHEETS-SHEET 1.

e 7 x f m I H. J. HUBER.

LAWN TRIMMER.

APPLIOATION mum JAN 10 1908 Patented Feb. 2, '1909.

2 SHEETS-SHEET 2.

PATENT OFFICE.

HENRY J. ROBER, OF SPRINGFIELD, OHIO.

LAWN-TRIMIIER.

Specification of Letters Patent.

Patented Feb. 2, 1909.

Application filed January 10, 1908. Serial No, 410,081.

To all whom it may concern:

Be it known that I, HENRY J. Roman, a citizen of the United States,residin at S ringfield, in the county of Clark and State oFOhm, haveinvented certain new and useful Irn rovcrnents in Lawn-Trimmers, ofwhich t 1e following is a specification.

My invention relates to lawn mowers, and particularly to lawn trimmersfor use supplemental to the ordinary mower.

The machine hereinafter described is especially adapted for trimming theedges of awns adjacent to buildings, curbs, fences or shrubbery, also inrecesses and angles of walls and other positions inaccessible to theordinal lawn mower. The machine is also adapter. to certain garden uses,such as trimming or thinning beds of growing vegetables, or inharvesting the produce.

The object of the invention is to greatly simplify the structure as wellas the means and mode of operation of such devices whereby they will notonly be cheapened in construction, but will be rendered more efficientin use, more easily operated, and unlikely to get out of re air.

Further o jects of the invention are to rovide a machine that will bereadily ad ustable for different height of cut, and in which the drivingmechanism will be easily reversible,from right to left and vice versa,for either a right or left handed operator and particularly to enablethe machine-to he used in close proximity to a wall on either side.

A further ob'ect is to provide cutting blades of such shape and suchmeans of attaching them, that the blades may he re moved and sharpenedwithout the use of special ap lia'nces, and to insure the replacing ofthe Andes in proper alinement.

With the above primar and other incidental objects in view as wi 1appear from the specification, the invention consists of the means,mechanism, construction, and mode of operation, hereinafter describedand set forth in the claims.

In the drawings Figure 1 is a perspective view of the forward oroperating portion of the machine. Fig. 2 is a view of the u per handleortion showing the driving mec anisrn. Big. 3 is a side elevation of theoperating portion of the machine, showing bv dotted lines the range ofadjustment for different heights of cut. Fig. 4 is a detail plan viewillustrating the method of attaching the blades, and in dotted lines therelative position of the carr ing wheels. Fig. 5 is a plan view of amodi led construction, showing the use of a plurality of cutting bladesand the! driving connections. Fi 6 shows a rhodi -cation similar to thatof iig. 5 with a differ ent method of actuating the several blades.

Like parts are indicated by similar characters of reference throughoutthe several views. I y In constructing the machine there is employed amain frame member 1, somewhat L s raped, the upper portion of which isin clined forward as shown in Figs. 1 and 3, Projecting rearward fromthe main frame 1 is a boss 2 to which is secured a rearwar'clly and uwardly extending tubular handle 3, throuv 1 which extends a revolubleshaft 4, provided with suitable bearings and carrying at its lower endan eccentric 5. Pivoted' at 6 upon the main frame I is a double yoke 7the upper bifurcated end of which engages the eccentric 5, while thelower bifurcated end enga es the tail 8 of an oscillatory block 9pivoter at 10 on the horizontal portion of the main frame 1. Theforwardend of the main frame! is recessed or rabbeted as at 11, in whichrecess are located two outwardly inclined or diverging stationary cutterblades 12. It is obvious that a single blade having a V sha ed recessprovided with cutting edges mig it bcemployed, but

the use of separate blades as shown is preferable, since either blade ifdamaged could be easily replaced without disturbing the other, and theseparate blades may be readily sharpened with such whetstones orsharpening devices most likely to be found at hand, and without the useof special appliances. The respective blades 12 are retained in positionon the main frame by screws 13. To insure the return of the blades, whenremoved, to proper alinem ent and to provide for the proper positioningoi interchangeable sets of la es, dowel ins 14 are located in the mainframe 1, which en'- gage corresponding holes in the respectivelades,'thus obviating any danger of unalniemerit. "The blades 12 arelocated with their upper surfaces flush with the surfaceof the mainframe, Attached to the oscillatory block 9 and adapted to oscillate in ahon:

zontal plane immediately above the blades l2 is a movable blade 15cooperating with the stationary blades 12 to shear the grass therewith.The tail 8 of the block 9 extending within the bifurcation of the lowerend of the yoke 7 causes the block and there with the blade 15 tooscillate in unison'with the yoke 7 which is actuated by the rcvolublemovement of the shaft 4 and. eccentric 5, carried thereby.

Carrying wheels 17 are provided, mounted on an axle 18 upon winch issupported a standard 19 adjustably connected upon the handle 3 by asplit collar 20 clamped upon the handle in the usual manner by a clampscrew or bolt 21. By loosening the screw 21 the handle ma be ad'usted upand down through the co lar 20 thus varying the rela tion of'the mainframe with the surface of the ground, for dilferent heights of cut asindicated by dotted lines in Fig. 3. The handle 3 may also be adjustedrevolubly within the split collar 20 to mcline the frame 1 with thewheel base or the surface of the ground in order to more easil Y trimthe bottom angle of a terrace, or to shape a row of growing plants suchas a walk border oi ornamental plants. The shaft 4 is extended beyondthe upper end of the tubular handle 3 and can rles the bevel pinion 22,which meshes with a bevel drive gear 23 provided with the operatingcrank 24 and journaled on a trunnion on a supporting member 25. Thebevel drive car 23 is referably extended as at 26 to orm a be ance orlly wheel to facilitate the operation of the machine. However forcertain classes of work it is preferable to rovide a balance disk 27 onthe lower end of the shaft 4 beyond the eccentric 5 as shown full inFig. 3 and in dotted lines in Fig. l. A alance wheel either at .26 or 2}will assist materially toward. the smooth. operation of the machine andobv ate undue vibration of the arts. The supporting1 member 25 is' adustably secured upon t e handle 3 by a split collar 28 operated by aclamping screw 29 similar to the collar 20 and screw 21. The u )per endof the member 25 is formed into t e handle or grip 30 by which themachine is propelled. he member 25 is revolubly adjusta )lU on thehandle 3 that the drive gear 23 and crank 24 may be turned to eitherside of the handle to accommodate either a right or left handed person,and especially to permit the use of the machine ad acent to a wall oneither side, without the interference of the crank with the wall. Ahousing, 31, not shown in Fig. 1 but shown in section in Fig. 3 inclosesand protects the working arts of the machine against accident and t 1eentrance of dirt or rass clippings. The'carr ing wheels 17 are c atewithin the s c of the main frame as indicated by dotted lines in Fig. 4.For certain purposes a machine of greater width having a plurality ofcutting blades may be desired. In Fig. 5 is illustrated a machine havingthree oscillating blades, the

intermediate blade 32 corresponding to the blade 15 of the singlestructure, and 0 erated in a similar manner by a yoke 33. he outerblades 34 are ivoted to the main frame which is extended aterally toaccommodate the blades.

1n the drawing the rear extremity of the tail 35 of the oscillatoryblocks 36 is shown upturned to form a trunnion for a link 37 pivotallyconnected at one end to said upturned portion of the tail 35 and at theother end to the in s or cars 38 on the yoke 33.

\Vhile the a Jove method is described and shown it is obvious that othermethods of attaching the tail. portions 35 with the yoke 33 might beemployed, which would operate equally as well.

The intermediate stationary blades 39 of the modified structure may be Vshaped as shown, or may be in two portions as indicated by dot and dashline in said Fig. 5.

It will be apparent from the above description that there is thusproduced a trimmer of the class described, having the particularfeatures of advantage before enumerated as desirable, but which isobviously susceptible of modification in its form, proportion,de-

tail construction and arrangement of parts without departing from theprinciples involvcd or sacrificing any of their advantages.

Having thus described my invention I claim;

1. In a machine as described an angplar main frame, an upwardly inclinedhandle on which said frame is supported, stationary divergent cuttingblades carried on said frame, a double-edged oscillating cutting bladepivoted on the main frame, two carrying wheels, an axle on which saidwheels are mounted, a standard rojecting upward from said axleintcrmeriate said wheels, said standard terminatin in a collar withinwhich said handle is ongitudinally and rcvolubly ad'ustable, said wheelsnormally extending sulistantially flush with the sides of said mainframe, substantiall as specified.

2. In a machine as descri ed, a int-in frame, stationary cuttint bladesand an oscillating blade on said 'rame, a rearward extending tailportion connected to" said oscillating blade, a double yoke memberpivoted on said main frame, oneend of said yoke engaging said extendedtail portion, and an actuating revoluble eccentric ena ed by theopposite end. of said yoke, s41 istantlally as specified.

3. In a machine as described, a main frame, a handle upon which saidframe is supported, cutting blades and actuating mechanism therefor,carryin wheels, a standard supported on said wlleels and engaging saidhandle, said handle bein both revolubly and longitudinally adjustablerelative to said standard and wheels, substantially as specified.

4. In a machine as described, a main frame, carryin wheels, a handle,stationary blades on'sair frame, an oscillatory blade mounted on saidframe, a tail portion attached to said blade, a revoluble eccentric,means for actuatin same, a member pivote on said frame and ifurcated atits opposite ends, one of said bifurcated ends engaging said tail ortionand the other bifurcated end engaging said eccentric, substantially asspecified.

5. In a machine as described, a main frame, carrying wheels, a handlestationary cutting blades on said frame, an oscillatory l blade pivotedon said frame, a tail portion attached to said blade, a revolubleeccentric, l means for actuatin same, a member pivoted on said frame andbifurcated at its opposite ends one of said bifurcated ends engagingsaid tail portion and the other bifurcated end engagin said eccentric,inde endent oscil latory blades on either-side of t fie first named loscillatory blade, links pivoted to said bifurcated member and engagingthe independent oscillatory blades whereby all of said blades will becaused to osclllate in unison, substantially, as specified.

6. In a machine as described, a main frame, a handle attached thereto,blades and actuating mechanism carrying Wheels, said main cuttingtherefor, frame being subl stantially its upper portion angles to the uward and rearward stantially as specifi V shaped, with its lower portionsubstantially parallel with the round, and substantialy at right a mainframe, carrying wheels an upward and rearward inclined tubular handle,statlonary divergent cutting pivoted oscillating cuttin with saidstationary shaft extending thr an eccentric (JtLIllCt.

yoke member on said frame engaging blades on said frame, a bladecooperating b ades, a revolu 1e ough said tubular handle, 1 on saidshaft, a pivoted said eccentric and oscillated thereby, said yoke memberin turn engaging oscillating blade on its pivota the upper end of memberadjustably and supporting a which supporting membe reversible on saidspecified.

In testimony wh 1 my hand this 4th dag Witnesses ear meshes with saidpinion,

said pivoted cutter blade and oscillating said 1 connection, a pinion onsaid shaft, a su porting mounted on saifl handle drive gear and crank,said r, crank and gear being handle, substantially as ereof I havehereunto set of January 1908. ENRY J. ROBER.

JACOB KLEEMAN, J. R. KELLY.

extend- L.

